IS200TREGH1B
IS200TREGH1B
IS200TREGH1B
products, products not only like Continental 590, a generation of products used to the end. Abb also invested a lot of manpower and material resources to maintain the same replacement speed as dcs and acs, which shows the importance abb attaches to its DC governor products. abb is also one of the few brands with the strength to compete directly with Siemens 6ra series governors. 
The Abbdcs400 DC governor is widely used in the market, with power ranging from tens of kilowatts to hundreds of kilowatts. (This power covers a wide range, and larger power and more complex applications are handed over to the dcs500/600 series.) Dcs400 is far from high-end among abb products, but the software is user-friendly, quick to use and easy to configure. The hardware is convenient, mainly divided into power drive board and application control board, dcs400 series due to design reasons, power drive board is easy to go wrong, more annoying is that the dcs400 excitation control is also integrated in this board, and the dcs400 software is not support excitation off this function, which brings some difficulty to the maintenance. In the actual maintenance, abbdcs400 caused by excitation fault is the most. There is the control power supply, the control power supply of this board secondary sampling is quite strange, not online main control board, power supply will produce protection, but connected to the main control board maintenance power supply, not good will burn the motherboard, then the problem is expanded, more than worth the loss.
Case: A user repairs dcs400(500a)4q governor, the fault is the power supply hiccup, the main board digital tube is not clear out, the customer sent to repair. My analysis of power supply hiccup is divided into two steps :1. There is a short circuit in the rear stage; 2. The sampling circuit is faulty, resulting in feedback sampling overvoltage protection. After measuring the stage impedance, static impedance has no obvious short-circuit, unplug the excitation power supply, the fault is still, because the motherboard is not
